Structure and magnetotransport properties of epitaxial nanocomposite La{sub 0.67}Ca{sub 0.33}MnO{sub 3}:SrTiO{sub 3} thin films grown by a chemical solution approach.
- Materials Science Division
Epitaxial La{sub 0.67}Ca{sub 0.33}MnO{sub 3}:SrTiO{sub 3} (LCMO:STO) composite thin films have been grown on single crystal LaAlO{sub 3}(001) substrates by a cost effective polymer-assisted deposition method. Both x-ray diffraction and high-resolution transmission electron microscopy confirm the growth of epitaxial films with an epitaxial relationship between the films and the substrates as (002){sub film}||(002){sub sub} and [202]{sub film}||[202]{sub sub}. The transport property measurement shows that the STO phase significantly increases the resistivity and enhances the magnetoresistance (MR) effect of LCMO and moves the metal-insulator transition to lower temperatures. For example, the MR values measured at magnetic fields of 0 and 3 T are {approx}44.6% at 255 K for LCMO, {approx}94.2% at 125 K for LCMO:3% STO, and {approx}99.4% at 100 K for LCMO:5% STO, respectively.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1042580
- Report Number(s):
- ANL/MSD/JA-73532
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 8 Vol. 100; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- ENGLISH
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